code: def __init__(self, shrink_ratio=0.4, thresh_min=0.3, thresh_max=0.7):
      self.shrink_ratio = shrink_ratio
      self.thresh_min = thresh_min
      self.thresh_max = thresh_max
  
file_path: PaddleOCR/benchmark/PaddleOCR_DBNet/data_loader/modules/make_border_map.py
imports: import cv2
  import numpy
  import pyclipper
  from shapely.geometry import Polygon
label_desc: Use image node_id 1 to create a new MakeBorderMap object  with example: obj = MakeBorderMap(shrink_ratio, thresh_min, thresh_max)